Question

我有这句话：
It seems to be the basic assumption of traditional philosophies that human <span style="color:#ff5e43;">intellectual</span> powers are for (abc) the purpose of accelerating our own evolution beyond the restraints of the biological determinism which binds all other living organisms.

我需要按照长度匹配单词。我使用这个正则表达式语法，其长度增加了一个循环：
(?:^| )(\S{index})(?= |$)

但是在5时，它也匹配 _＆lt; span

在5处，结果应该是：seems basic human (abc) which binds other

在此链接中，我尝试Regex101

Answer 1

只需使用\w代替\S。见here

\w表示由[A-Za-z0-9_]组成的单词。

Answer 2

这里最简单也可能是最好的解决方案是根本不使用正则表达式。相反，使用DOM的强大功能来摆脱不必要的东西，并只查看干净的文本。

// Setup
var string = 'It seems to be the basic assumption of traditional philosophies that human <span style="color:#ff5e43;">intellectual</span> powers are for (abc) the purpose of accelerating our own evolution beyond the restraints of the biological determinism which binds all other living organisms.',
    text,
    pass = [];

// Define length
var wordlength = 5;
// Make a new div for the elements to sit in
$textNode = $(document.createElement('div')).html(string);
// Remove html tags but keep their content (e.g. the span tag)
text = $textNode.text();
// Split the text at the spaces
text = text.split(' ');
// Loop through the new array to find words with specific length
$.each(text,function(i,el){
   if (el.length === wordlength) pass.push(el);
});

var string = 'It seems to be the basic assumption of traditional philosophies that human <span style="color:#ff5e43;">intellectual</span> powers are for (abc) the purpose of accelerating our own evolution beyond the restraints of the biological determinism which binds all other living organisms.',
    text,
    pass = [],
    wordlength = 5;

$textNode = $(document.createElement('div')).html(string);
text = $textNode.text().split(' ');
$.each(text,function(i,el){
   if (el.length === wordlength) pass.push(el);
});
document.write(pass.join(' '));

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

匹配单词长度避免标记

2 个答案: